MCQOPTIONS
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| 1. |
During the maintenance of an earthen dam, the apparent seepage through the foundation of the dam is best taken care of by providing ______________________ |
| A. | chimney drain |
| B. | rock toe |
| C. | drain trench along the downstream toe |
| D. | upstream impervious cut-off |
| Answer» D. upstream impervious cut-off | |